Fatal: QFontDatabase: Cannot find font directory

[MurKit]

Ubuntu 14.04
I made the installer 755 :
~/Downloads $ ll GrblControllerLinuxInstallerx86-3.6.1
-rwxr-xr-x 1 username username 38M Apr 16 19:25 GrblControllerLinuxInstallerx86-3.6.1*

But install is failed:
~/Downloads $ ./GrblControllerLinuxInstallerx86-3.6.1
Fatal: QFontDatabase: Cannot find font directory /usr/local/Qt-5.3.1/lib/fonts - is Qt installed correctly? (fontdatabases/basic/qbasicfontdatabase.cpp:99, virtual void QBasicFontDatabase::populateFontDatabase())

QFontDatabase: Cannot find font directory /usr/local/Qt-5.3.1/lib/fonts - is Qt installed correctly?fish: “./GrblControllerLinuxInstallerx…” terminated by signal SIGABRT (Abort)